C# 前端无插件打印导出实现方式详解
作者：鱼是一只鱼啊
本文讲述了使用C#实现前端无插件的打印和导出功能,介绍了相关技术和方法,适合需要在项目中实现相应功能的开发者参考
打印
打印导出分布页
@model List<界面的数据模型类>
@using WingSoft;
@using Newtonsoft.Json;
<style type="text/css">
.modal-content {
width: 800px;
}
.modal-body {
height: 400px;
}
</style>
<script type="text/javascript">
$(function () {
if (@ViewBag.pe== 0) {//打印
let content = ''
for (var i = 0; i < $(".boxDiv").length; i++) {
content += $(".boxDiv").eq(i).html() + '<div style="page-break-after: always;"></div>'
}
printFunc(content);
} else {//导出（将所有数据导出到一个excel，多个工作表的形式）
let contentArray = [];
for (var i = 0; i < $(".boxDiv").length; i++) {
contentArray.push({
html: $(".boxDiv").eq(i).html(),
name: "xx记录表" + (i + 1)
});
}
exportToExcelBatch('xx记录表',contentArray)
}
});
</script>
<div class="modal fade" id="modal" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">
<img src="~/Images/icon_closed.png" />
</button>
</div>
<div class="modal-body">
@for (var i = 0; i < Model.Count; i++)
{
<div class="boxDiv">
<style>
.boxDiv table {
width: 100%;
display: flex;
flex-direction: column;
align-items: center;
}
.printTable {
width: 100%;
font-family: "宋体";
border: 0px;
color: #333;
font-size: 12px;
}
.printTable th {
font-weight: 600;
font-size: 14px;
}
.printTable td, .printTable th {
text-align: center;
padding: 3px 3px;
}
.content td {
border: 1px solid #4a4a4a;
}
.tabletitle1 {
font-size: 20px;
font-weight: bold;
}
.tabletitle2 {
font-size: 18px;
font-weight: bold;
position: relative;
}
.contenleft {
text-align: left !important;
}
.contenright {
text-align: right !important;
}
.boxcontent {
height: 30px;
font-size: 14px;
}
.footertext {
font-size: 14px;
}
.printTable td, .printTable th {
border: 1px solid #E5E5E5;
padding:3px;
font-size:14px;
}
.printTable thead th{
text-align:center;
}
</style>
<div class="modal-title" style="font-size:18px;text-align:center;">@Model[i].SchoolName 经营成本</div>
<div style="margin:10px 0">
<span>食堂名称：@Model[i].CanteenName</span>
<span style="margin-left:30%">登记时间：@Model[i].ForDate</span>
</div>
<table class="printTable" border=0 cellspacing=0 cellpadding=0 style="border-collapse:collapse;width:100%;">
<thead>
<tr>
<th>序号</th>
<th>成本名称</th>
<th>成本金额（元）</th>
<th>备注</th>
</tr>
</thead>
<tbody style="width:100%;">
@{
int index = 1;
}
@foreach (var item in Model[i].CostItemList)
{
<tr>
<td>@(index++)</td>
<td>@item.Name</td>
<td>@item.TotalMoney</td>
<td>@item.Remark</td>
</tr>
}
</tbody>
</table>
</div>
}
</div>
<div class="modal-footer">
<button type="button" class="btn2 btn_90_28" data-dismiss="modal">关闭</button>
</div>
</div>
</div>
</div>打印js
// 打印
function printFunc(data) {
loadStart();
var iframeHtml = document.createElement("iframe");
iframeHtml.id = "iframePrintBox";
iframeHtml.style.width = "0";
iframeHtml.style.height = "0";
document.body.appendChild(iframeHtml);
iframeHtml.srcdoc = '<!DOCTYPE html>' + data + "<script type='text\/javascript'>window.onload = function(){window.print();window.onafterprint = ()=>{window.parent.close();}}<\/script>";
loadEnd()
}导出
//多sheet导出
function exportToExcelBatch(sheetName, exportArr) {
var fileName_g, sheetsName_g, mainHtml_g, sheetHtml_g
// 导出函数
sheetsName_g = getSheetsName() //获取到每个sheet的名称集合
fileName_g = sheetName + '.xlsx' //外部导出名称
sheetHtml_g = getSheetXml() //得到每一个sheet的xml片段
mainHtml_g = getMainXml() //导出的主体xml片段
let XLSData = 'data:application/vnd.ms-excelbase64,' + window.btoa(window.unescape(encodeURIComponent(mainHtml_g)))
// 下载
download(XLSData)
// 下载
function download(base64data) {
let blob
if (window.navigator.msSaveBlob) {
blob = base64ToBlob(base64data)
window.navigator.msSaveBlob(blob, sheetName + '.xlsx')
return false
}
let a = document.createElement("a")
if (window.URL.createObjectURL) {
blob = base64ToBlob(base64data)
a.href = window.URL.createObjectURL(blob)
a.download = fileName_g
a.click()
return
}
a.href = base64data
a.download = fileName_g
a.click()
}
// 获取sheet名称
function getSheetsName() {
let sheetsName = []
exportArr.forEach((item) => {
sheetsName.push(item.name)
})
return sheetsName
}
// 创建文件流
function base64ToBlob(base64Data) {
let arr = base64Data.split(',')
let mime = arr[0].match(/:(.*?)/)[1]
let bstr = atob(arr[1])
let n = bstr.length
let u8arr = new Uint8ClampedArray(n)
while (n--) {
u8arr[n] = bstr.charCodeAt(n)
}
return new Blob([u8arr], { type: mime })
}
/**
* 文件下载
* @param {any} url 文件路径
* @param {any} fileName 文件名称
*/
function downloadFile(url, fileName) {
if (!url || !fileName) return false;
let aUrl = url;
const x = new XMLHttpRequest();
x.open('GET', aUrl, true);
x.responseType = 'blob';
x.onload = function (e) {
const url = window.URL.createObjectURL(x.response);
const elink = document.createElement('a');
elink.href = url;
elink.target = '_self'; // 当前页 target打开新页面
elink.download = `${fileName}`;
elink.style.display = 'none';
document.body.appendChild(elink);
elink.click();
document.body.removeChild(elink);
};
x.send();
}
// 获取所有xml代码
function getMainXml() {
let mainHtml = ''
let sheets = ''
if (sheetsName_g.length > 0) {
for (let i = 0; i < sheetsName_g.length; i++) {
let name = sheetsName_g[i]
let sheetItem = `
<x:ExcelWorksheet>
<x:Name>${name}</x:Name>
<x:WorksheetSource HRef=3D"export/sheet${name}.xml"/>
</x:ExcelWorksheet>`
sheets += sheetItem
}
}
mainHtml = `MIME-Version: 1.0
X-Document-Type: Workbook
Content-Type: multipart/related; boundary="----memo----"
------memo----
Content-Location: file:///C:/0E8D990C/export.xml
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html; charset="us-ascii"
<html xmlns:o=3D"urn:schemas-microsoft-com:office:office"
xmlns:x=3D"urn:schemas-microsoft-com:office:excel"
xmlns=3D"http://www.w3.org/TR/REC-html40">
<head>
<xml>
<o:DocumentProperties>
<o:Author>ijovo</o:Author>
<o:LastAuthor>ijovo</o:LastAuthor>
<o:Company>ijovo</o:Company>
<o:Version>1.0</o:Version>
</o:DocumentProperties>
</xml>
<!--[if gte mso 9]>
<xml>
<x:ExcelWorkbook>
<x:ExcelWorksheets>${sheets}
</x:ExcelWorksheets>
</x:ExcelWorkbook>
</xml>
<![endif]-->
</head>
</html>` + sheetHtml_g + `
------memo------`
return mainHtml
}
// 获取每个sheet的xml代码}
function getSheetXml() {
let sheetHtml = ''
let sheets = ''
for (let i = 0; i < exportArr.length; i++) {
let name = exportArr[i].name
// MIME要求格式必须顶格……所以这里排版比较乱……
let sheetItem = `
------memo----
Content-Location: file:///C:/0E8D990C/export/sheet${name}.xml
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html; charset="us-ascii"
<html
xmlns:o="urn:schemas-microsoft-com:office:office"
xmlns:x="urn:schemas-microsoft-com:office:excel"
xmlns="http://www.w3.org/TR/REC-html40">
<head>
<xml>
<x:WorksheetOptions>
<x:ProtectContents>False</x:ProtectContents>
<x:ProtectObjects>False</x:ProtectObjects>
<x:ProtectScenarios>False</x:ProtectScenarios>
</x:WorksheetOptions>
</xml>
<style>
<!-- @page
{mso-footer-data:"&C\\7B2C &P \\9875\\FF0C\\5171 &N \\9875";
margin:0.748in 0.195in 0.748in 0.195in;
mso-header-margin:0.51in;
mso-footer-margin:0.51in;}
-->
</style>
</head>
<body>`
let table = `<table border=0 cellspacing=0 cellpadding=0 width="100%" bordercolor="#000000" style="border-collapse:collapse">${exportArr[i].html}</table>`
sheetItem += table + `
</body>
</html>`
sheets += sheetItem
}
sheetHtml = sheets
return sheetHtml
}
}单表格导出
// 导出表格
function exportToExcel(sheetName, html) {
var uri = 'data:application/vnd.ms-excel;base64,';
var template = '<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel"' +
'xmlns="http://www.w3.org/TR/REC-html40"><head><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet>'
+ '<x:Name>{worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets>'
+ '</x:ExcelWorkbook></xml><![endif]-->' +
' <style type="text/css">' +
'table td {' +
'border: 0.5px solid #000000;' +
'width: auto;' +
'height: 25px;' +
'text-align: center;' +
'mso-number-format:\@;' +
'vnd.ms-excel.numberformat:\@;' +
/* 'background-color: #4f891e;' +*/
/* 'color: #ffffff;' +*/
' }' +
'table th {' +
'border: 0.5px solid #000000;' +
/* 'width: auto;' +*/
'height: 35px;' +
'text-align: center;' +
'font-size:20px' +
'mso-number-format:\@;' +
'vnd.ms-excel.numberformat:\@;' +
' }' +
'</style>' +
'</head><body ><table>{table}</table></body></html>';
//if (!tableid.nodeType) tableid = document.getElementById(tableid);
//var ctx = { worksheet: sheetName || 'Worksheet', table: tableid.innerHTML };
var ctx = { worksheet: sheetName || 'Worksheet', table: html };
var a = document.createElement("a");
a.download = sheetName + ".xls";
a.href = uri + this.excelBase64(this.excelFormat(template, ctx));
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
}
// Excel格式
function excelFormat(s, c) {
return s.replace(/{(\w+)}/g,
function (m, p) {
return c[p];
});
}
// 纯js导出Excel
function excelBase64(excelFile) {
return window.btoa(unescape(encodeURIComponent(excelFile)));
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